Nanometer near-infrared long-afterglow luminescent material as well as preparation method and application thereof

The nanonear-infrared long afterglow luminescent materials prepared by coprecipitation and microwave-assisted synthesis methods solve the problems of large sizes and uneven compositions of existing materials, and realize nanomaterials with uniform particle size and stable luminescent performance. They are suitable for biological tissue imaging and significantly improve signal intensity.

CN119842398APending Publication Date: 2025-04-18LANZHOU UNIV
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Patent Information

Application Number
CN202510049379.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-13
Publication Date
2025-04-18

AI Technical Summary

Technical Problem

The existing near-infrared long afterglow luminescent materials have problems such as large size, uneven composition, complex synthesis process and long cycles, which limit their application in the field of biomedical science.

Method used

A nano-infrared long afterglow luminescence material with a nano-sized chemical formula is Mg2-x/2-y/2Sn1-x/2-y/2O4:xCr3+,yA. Through co-precipitation and microwave-assisted synthesis methods, the solution pH value and microwave heating reaction are adjusted to obtain nano-infrared long afterglow luminescence material with uniform particle size and stable properties.

Benefits of technology

The particle size of the material is controlled below 500nm, and the luminous brightness is not significantly reduced. The excitation spectrum range is 250-700nm, and the main emission peak is between 750-900nm. It can be excited by X-rays, ultraviolet light, blue light or red light. The afterglow time is controlled at 0.5-5h, which significantly improves the signal intensity of biological tissue imaging.

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Abstract

The invention provides a nano near-infrared long-afterglow luminescent material as well as a rapid preparation method and application thereof, and belongs to the technical field of luminescent materials. The chemical general formula of the nano near-infrared long-afterglow luminescent material provided by the invention is Mg < 2-x / 2-y / 2Sn < 1-x / 2-y / 2O4: xCr < 3 + >, yA, in which A is one or more of Ga, Ge and Zn; wherein 0 < x < = 0.2, and 0 < = y < = 0.2. A homogeneous precipitation and microwave-assisted synthesis method is adopted, the near-infrared long-afterglow luminescent material is prepared through calcination, the average particle size of the near-infrared long-afterglow luminescent material is 500 nm or below, after high-concentration doping, the luminescent brightness can still be kept not to be obviously reduced, the excitation spectrum range is 250-700 nm, the main emission peak is 750-900 nm, and the near-infrared long-afterglow luminescent material can be excited by X rays, ultraviolet light, blue light or red light and can be applied to the field of luminescent devices. And the afterglow time is controlled to be 0.5-5 hours. The material is suitable for the field of biomedical imaging.
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Citation Information

Patent Citations

  • Near-infrared long-afterglow luminescent material and preparation method and application thereof

    CN110724530A

  • Near-infrared-like long-afterglow luminescent material and preparation method thereof

    CN111139075A